the ocean under the world's normal oceans in which the frez/fresnel/nel's use to travel. it was first discovered when the ancient fresnel's had to depart from their ancient land of freslovskia after being attacked by atilla.

It was so sad how the fresnels had to leave their homeland because of stupid atilla.

Yeah, but at least they have those three gills on their back so they could swim in the frez ocean to a new country.